128266461 has 12 divisors (see below), whose sum is σ = 185869788. Its totient is φ = 85235904.

The previous prime is 128266459. The next prime is 128266477. The reversal of 128266461 is 164662821.

128266461 is a `hidden beast` number, since 1 + 2 + 8 + 2 + 6 + 646 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22382361 + 105884100 = 4731^2 + 10290^2 .

It is not a de Polignac number, because 128266461 - 2¹ = 128266459 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128266441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19950 + ... + 25583.

It is an arithmetic number, because the mean of its divisors is an integer number (15489149).

Almost surely, 2^128266461 is an apocalyptic number.

It is an amenable number.

128266461 is a deficient number, since it is larger than the sum of its proper divisors (57603327).

128266461 is a wasteful number, since it uses less digits than its factorization.

128266461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45852 (or 45849 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 128266461 is about 11325.4784004915. The cubic root of 128266461 is about 504.3178857215.

The spelling of 128266461 in words is "one hundred twenty-eight million, two hundred sixty-six thousand, four hundred sixty-one".